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Force sensor becomes more and more miniature in order to achieve precise measurement in small place. A magnetostrictive micro sensor was proposed in the paper; meanwhile, the signal acquisition system was designed by Android platform and Arduino MCU to meet the popular mobile terminal. The structure of sensor and the hardware and software of system were designed to realize the functions of force signal acquisition, processing and analysis, and upload the data to mobile terminal in real time. It can be seen from the experimental tests: Firstly, the volume of sensor was less than 2 cm3 and had good linearity, while the sensitivity was 0.1537 mV/N and the repeatability error was 1.07%. Secondly, the system could effectively enlarge the output value of sensor more than 100 times and the nonlinear error was less than 1.5%, while the linearity and sensitivity can be kept well. This sensor with acquisition system had the advantages of easy realization, low cost, strong expansibility and simple operation, and it can be widely used in industrial control, mechanical automation, intelligent robot, and so on. © 2020 Institute of Electrical Engineers of Japan. Published by Wiley Periodicals LLC. [ABSTRACT FROM AUTHOR]

In this article, the antithunder composite insulator combining a surge arrester and insulator is developed. The insulation design and configuration principle of the composite insulator are analyzed through experiments and simulation. The studies of insulation performance have shown that the external breakdown air distance is 60 mm, and the length of the polymeric support insulator is 70 mm. Considering the more serious pollution (0.3 mg/cm2), the creepage distance of the insulation section must be larger than 250 mm. Test data of the antithunder composite insulator meet the standard requirements. The analysis of mechanical performance of the antithunder composite insulator is carried out, which shows that the overall mechanical strength needs to be greater than 2.38 kN. A three‐dimensional (3D) element finite model is built to simulate the behavior of the antithunder composite insulator in the distribution line. The simulation results indicate that the stress on the varistor and the core rod decreases with the increase of the size of the core rod. A core rod of 20 mm or more can meet the operation requirements. The simulation indicates that the stress of the varistor determines the force limit of the antithunder composite insulator. Therefore, attention should be paid to the performance stability of the varistor of the antithunder insulator under force. © 2019 Institute of Electrical Engineers of Japan. Published by John Wiley & Sons, Inc. [ABSTRACT FROM AUTHOR]